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Which of the following is a good measure of corrosivity?

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Which of the following is a good measure of corrosivity?

(a) Thermal conduction

(b) Electrical resistance

(c) Thermal resistance

(d) Mechanical properties

I had been asked this question in an interview for internship.

My doubt stems from Environments topic in division Other Environments of Corrosion Engineering

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The correct answer is (b) Electrical resistance

To explain: Electrical resistance is a good measure of corrosivity of a corrosive solution. Higher electrical resistance lowers the corrosivity of a solution. Dry soils are generally not very corrosive due to high electrical resistance.

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